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Old 20th January 2018, 15:10   #1678  |  Link
jdobbs
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Join Date: Oct 2001
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Quote:
Originally Posted by spexman View Post
jdobbs, thank you for your comments...and your interesting program.
Having the same player, you will know then that mkvs with DTSHD will play just fine(smooth video, proper audio), even at level 5.1. But, with Atmos mkvs, the video will play smoothly, but the Atmos is not recongnized(though AC3 is).
Thus the need to remux Atmos mkvs to m2ts. Remuxing to m2ts with TsMuxer gives Atmos playback but video stutter and sync issues.
I tried your program and then tried to playback the m2ts stream only--again, the stutter/sync issues were present. I did NOT try to burn to disc and play as a UHD.
You mention that the stream needs to be BD compliant--are you saying that it is the level 5.1 that makes it non-compliant, even though level 5.1 does work in an mkv?
Your insight is appreciated.
TSMUXER muxes HEVC using a start code that is the same as AVC. The BD standard uses a unique start code for HEVC. So all the headers in the video stream have to be updated as well as all the Program Map records. This applies only to the M2TS files in a BD structure, not MKV files. TSMUXER also uses incorrect values for the type and format of the video in the MPLS and CLPI files -- so that has to be updated. If the stream uses HDR, there also has to be an extension added to the MPLS. Finally, all the files (CLPI, MPLS, and the .BDMV files) have to be updated to show they comply with v3 of the BD standard (which supports UHD).

There are other requirements for HEVC in a BD structure as well, such as limits to GOP size, maximum bitrates, etc.

I don't believe Atmos support is required in a BD player -- if I recall correctly it is an extension that is optional. That's why a stream that contains Atmos must also contain a standard AC3 stream in the same mux. It could be the missing AC3 stream that is causing the confusion (even in the MKV) -- but that's just a guess.

Not sure if that answers your question. Let me know. As for level 5.1 -- every original disc I've seen uses 5.1.
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Last edited by jdobbs; 20th January 2018 at 15:26.
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